147 lines
4.0 KiB
Java
147 lines
4.0 KiB
Java
package eu.dnetlib.conf;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.Properties;
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import javax.servlet.ServletContext;
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import org.apache.catalina.Container;
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import org.apache.catalina.connector.Connector;
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import org.apache.catalina.core.StandardContext;
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import org.apache.catalina.core.StandardEngine;
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import org.apache.commons.lang.reflect.FieldUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.FactoryBean;
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import org.springframework.beans.factory.annotation.Required;
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/**
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* This factory generates default properties based on the amount of information available from the servlet container.
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*
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* @author marko
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*
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*/
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public class WebappContextProperyFactory extends AbstractWebappContextProperty implements FactoryBean<Properties> {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(WebappContextProperyFactory.class); // NOPMD by marko on
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// 11/24/08 5:02 PM
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/**
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* If false, the ip address will be returned, otherwise a best effort attemp will be made to retrieve a meaningful host name. There is a
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* risk that the hostname is obtained without domain and thus completely useless.
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*/
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private boolean resolveHostname = false;
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private PropertyFetcher propertyFetcher;
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@Override
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public Properties getObject() throws Exception {
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Properties props = new Properties();
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if (getContext() == null) return props;
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props.setProperty("container.context", getContext());
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log.debug("trying to autodetect port and hostame");
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// if the user didn't customize, then autodetect, otherwise honour the
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// user!
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if (propertyFetcher.isUnchangedPort()) {
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log.debug("PORT IS NOT OVERRIDDEN, autodetecting");
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int port = getPort(getServletContext());
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if (port > 0) {
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props.setProperty("container.port", Integer.toString(port));
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}
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} else {
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log.debug("PORT IS OVERRIDDEN, NOT autodetecting");
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}
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if (propertyFetcher.isUnchangedHostname()) {
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log.debug("HOST IS NOT OVERRIDDEN, autodetecting");
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String hostname = getHost(getServletContext());
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if (hostname != null) {
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props.setProperty("container.hostname", hostname);
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}
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} else {
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log.debug("HOST IS OVERRIDDEN, NOT autodetecting");
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}
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return props;
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}
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@Override
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public Class<?> getObjectType() {
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return Properties.class;
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}
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@Override
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public boolean isSingleton() {
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return true;
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}
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private int getPort(final ServletContext servletContext) {
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try {
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return getContainerPort(servletContext);
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} catch (Throwable e) {
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log.warn("cannot obtain port from container...strange: I thought it would work both on jetty and tomcat7...)", e);
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return 0;
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}
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}
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private int getContainerPort(final ServletContext servletContext) {
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try {
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Object o = FieldUtils.readField(servletContext, "context", true);
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StandardContext sCtx = (StandardContext) FieldUtils.readField(o, "context", true);
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Container container = sCtx;
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Container c = container.getParent();
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while ((c != null) && !(c instanceof StandardEngine)) {
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c = c.getParent();
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}
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if (c != null) {
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StandardEngine engine = (StandardEngine) c;
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for (Connector connector : engine.getService().findConnectors()) {
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if (connector.getPort() > 0) return connector.getPort();
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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return 0;
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}
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private String getHost(final ServletContext servletContext) {
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try {
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if (resolveHostname) return InetAddress.getLocalHost().getCanonicalHostName();
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else return InetAddress.getLocalHost().toString().split("/")[1];
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} catch (UnknownHostException e) {
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log.warn("cannot obtain hostname from JVM", e);
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}
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return null;
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}
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public boolean isResolveHostname() {
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return resolveHostname;
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}
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public void setResolveHostname(final boolean resolveHostname) {
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this.resolveHostname = resolveHostname;
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}
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public PropertyFetcher getPropertyFetcher() {
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return propertyFetcher;
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}
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@Required
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public void setPropertyFetcher(final PropertyFetcher propertyFetcher) {
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this.propertyFetcher = propertyFetcher;
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}
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}
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